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以1981-2010年育成的62个水稻(Oryza sativa)品种为材料,分析不同时期水稻品种品质性状多样性和亲缘系数的变化,并通过主坐标分析、聚类分析了解品种间的形态距离和遗传关系。结果表明,随着育种时间的推移,辽宁省水稻品种间品质性状多样性下降,遗传基础狭窄。在今后的水稻品质育种工作中应拓宽亲本来源、加强种质交流,充分利用现有育成品种间的遗传差异,最大程度发挥优质骨干亲本的作用。
Based on 62 rice cultivars (Oryza sativa) bred in 1981-2010, the variation of quality traits and relatives coefficients of rice cultivars at different periods were analyzed. By means of principal coordinate analysis and cluster analysis, the morphological distance and inheritance relationship. The results showed that along with the breeding time, the diversity of quality traits in Liaoning rice varieties decreased and the genetic basis was narrow. In the future rice quality breeding work should broaden the parental origin, to strengthen the exchange of germplasm, make full use of genetic differentiation among existing breeding varieties, to maximize the role of quality backbone parents.